[go: up one dir, main page]

WO2018141185A1 - Dispositif anti-refoulement de type à pression réduite - Google Patents

Dispositif anti-refoulement de type à pression réduite Download PDF

Info

Publication number
WO2018141185A1
WO2018141185A1 PCT/CN2017/118999 CN2017118999W WO2018141185A1 WO 2018141185 A1 WO2018141185 A1 WO 2018141185A1 CN 2017118999 W CN2017118999 W CN 2017118999W WO 2018141185 A1 WO2018141185 A1 WO 2018141185A1
Authority
WO
WIPO (PCT)
Prior art keywords
valve
rocker
backflow preventer
valve seat
valve body
Prior art date
Application number
PCT/CN2017/118999
Other languages
English (en)
Chinese (zh)
Inventor
霍达文
吴柏敏
梁建林
陈键明
何国豪
黎彪
潘庆祥
黄明亮
区家显
Original Assignee
广东永泉阀门科技有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 广东永泉阀门科技有限公司 filed Critical 广东永泉阀门科技有限公司
Priority to US16/335,247 priority Critical patent/US20190249778A1/en
Publication of WO2018141185A1 publication Critical patent/WO2018141185A1/fr

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/16—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members
    • F16K1/18—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps
    • F16K1/20—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps with axis of rotation arranged externally of valve member
    • F16K1/2007—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps with axis of rotation arranged externally of valve member specially adapted operating means therefor
    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03F—SEWERS; CESSPOOLS
    • E03F7/00—Other installations or implements for operating sewer systems, e.g. for preventing or indicating stoppage; Emptying cesspools
    • E03F7/02—Shut-off devices
    • E03F7/04—Valves for preventing return flow
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/16—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members
    • F16K1/18—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps
    • F16K1/20—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps with axis of rotation arranged externally of valve member
    • F16K1/2028—Details of bearings for the axis of rotation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/16—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members
    • F16K1/18—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps
    • F16K1/20—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps with axis of rotation arranged externally of valve member
    • F16K1/2042—Special features or arrangements of the sealing
    • F16K1/205—Special features or arrangements of the sealing the sealing being arranged on the valve member
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/32—Details
    • F16K1/34—Cutting-off parts, e.g. valve members, seats
    • F16K1/42—Valve seats
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/32—Details
    • F16K1/52—Means for additional adjustment of the rate of flow
    • F16K1/523—Means for additional adjustment of the rate of flow for limiting the maximum flow rate, using a stop
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
    • F16K11/10—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with two or more closure members not moving as a unit
    • F16K11/105—Three-way check or safety valves with two or more closure members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K15/00—Check valves
    • F16K15/02—Check valves with guided rigid valve members
    • F16K15/03—Check valves with guided rigid valve members with a hinged closure member or with a pivoted closure member
    • F16K15/033—Check valves with guided rigid valve members with a hinged closure member or with a pivoted closure member spring-loaded
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K15/00—Check valves
    • F16K15/02—Check valves with guided rigid valve members
    • F16K15/03—Check valves with guided rigid valve members with a hinged closure member or with a pivoted closure member
    • F16K15/035—Check valves with guided rigid valve members with a hinged closure member or with a pivoted closure member with a plurality of valve members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K15/00—Check valves
    • F16K15/18—Check valves with actuating mechanism; Combined check valves and actuated valves
    • F16K15/182—Check valves with actuating mechanism; Combined check valves and actuated valves with actuating mechanism
    • F16K15/1821—Check valves with actuating mechanism; Combined check valves and actuated valves with actuating mechanism for check valves with a hinged or pivoted closure member

Definitions

  • the present invention relates to the field of pipeline valve technology, and more particularly to a pressure reducing type backflow preventer.
  • the backflow preventer is used for pipes such as sewage treatment to prevent backflow of liquid flowing back to cause backflow pollution.
  • the backflow preventer is a valve device consisting of two separate check valves and a safety drain valve.
  • the existing check valve structure is too simple, and the resistance to water flow is very obvious.
  • the resistance of the check valve to the water flow increases linearly as the opening of the valve flap increases, and the safety drain valve frequently drains water when the pressure chambers of the backflow preventer generate less pressure fluctuations.
  • valve seat of the domestic check valve is basically made of metal.
  • the fixed connection between the parts and the parts must be made by traditional mechanical connection, such as threaded connection, the valve seat must be drilled and tapped, and then Each component is fixedly mounted in the valve seat by a threaded connection, which consumes material.
  • threaded connection such as threaded connection
  • Each component is fixedly mounted in the valve seat by a threaded connection, which consumes material.
  • the components and the valve seat repeatedly vibrate, and the components are prone to loosening.
  • the technical problem to be solved by the present invention is to provide a decompression type backflow preventer for the above-mentioned drawbacks of the prior art.
  • the technical solution adopted by the present invention to solve the technical problem thereof is to provide a pressure reducing type backflow preventer, comprising a valve body, two check valves having the same structure, and a drain valve; the valve body internally forms a cavity and a valve
  • the valve wall of the body has a water inlet, a water outlet and a water discharge port; the two check valves are fixedly installed in the valve body through the support member, respectively at the water inlet and the water outlet; the drain valve is installed outside the valve body
  • the check valve includes a valve seat, a valve flap, a rocker, and a double torsion spring; one side of the valve flap is hinged at an upper end of the valve seat, and the other side is mounted with a roller; the rocker One end is a fixed end, the other end is a free end, and the fixed end of the rocker is connected to the lower end of the valve seat through a pin shaft; the roller abuts on the rocker and slides between the fixed end of the rocker and the free end of
  • the free end of the rocker is provided with a hook portion.
  • a buckle hole is formed on the free end of the rocker.
  • one side of the valve disc on which the roller is mounted is provided with a limiting groove for limiting the movement of the rocker back hook.
  • the valve seat is provided with two supporting pieces for fixing the valve flap, and the valve flap is fixed between the two supporting pieces by a pivot;
  • the valve seat is a plastic piece, and the supporting piece is
  • the metal piece is integrally formed with the valve seat by using a plastic insert technology;
  • the limit hook is a metal piece, and the limit hook is integrally formed with the valve seat by using a plastic insert technology.
  • the valve flap is provided with a rubber sheet and a pressure plate, and the rubber sheet is fixed to the valve flap by bolts on the pressure plate.
  • the left and right sides of the valve seat extend outwardly with a boss for fixing the mounting support, the boss is provided with a fixing nut; the support member is connected with a stud, and the stud is sleeved with a locknut One end of the stud is screwed to the fixing nut, and the other end of the stud is screwed to the support member; the support member is fixedly installed in the valve body by adjusting the lock nut on the stud.
  • the bottom surface of the boss on the left and right sides of the valve seat has a gap with the inner wall of the valve body.
  • the side surfaces of the bosses on the left and right sides of the valve seat are in contact with the inner wall of the valve body to prevent the check valve from rotating and rotating in the valve body.
  • the fixing nut is a metal piece, and the fixing nut is integrally formed with the valve seat by using a plastic insert technology.
  • the top of the valve body is provided with a detachable valve cover.
  • the check valve in the preventer has a different swinging structure, so that the check valve can achieve better backflow prevention effect: on the one hand, when the valve flap is closed, there is enough between the valve seat and the valve flap. Sealing force. During the opening of the flap, the resistance of the check valve to the water flow decreases as the opening of the flap increases. On the other hand, regardless of the increase or decrease of the water flow, the roller of the check valve slides along the length of the rocker, and the rocker plays a certain guiding role, so that the opening of the valve flap is more stable.
  • plastic valve seat and metal support piece, metal hook and metal nut are formed by plastic insert technology at one time, no need to use bolt connection or other mechanical means to make each component fixedly mounted on the valve seat. And the installation is very firm, which solves the problem that the domestic valve seat is basically made of metal material, the fixed connection between the parts and components consumes time and materials; and the check valve is solved during the opening and closing process. Repeated vibration between the parts and the seat, the parts are prone to loosening.
  • the double torsion spring of the check valve is easy to install: the spring member of the conventional check valve structure is very cumbersome to install.
  • the present invention only needs to put the double torsion spring into the pin through the two limit hooks disposed at the lower end of the valve seat. On the shaft, then use a screwdriver to respectively twist the left and right twisting arms of the double torsion spring to the corresponding limit hook limit. This hooking method facilitates the installation and disassembly of the spring.
  • FIG. 1 is a schematic structural view of a decompression type backflow preventer and other pipes according to a preferred embodiment of the present invention
  • Figure 2 is a cross-sectional view of Figure 1;
  • FIG. 3 is a schematic structural view of a decompression type backflow preventer according to a preferred embodiment of the present invention.
  • Figure 4 is an enlarged plan view showing the area A of Figure 3;
  • Figure 5 is an enlarged plan view showing the area B of Figure 3;
  • Figure 6 is a schematic structural view of a check valve and a support member
  • Figure 7 is an enlarged schematic view of a region C in Figure 6;
  • Figure 8 is an enlarged schematic view of a region D in Figure 6;
  • Figure 9 is an enlarged schematic view of the area E in Figure 6;
  • Figure 10 is a structural schematic view showing the closed state of the check valve in accordance with a preferred embodiment of the present invention.
  • Figure 11 is a schematic view showing the structure of the check valve in a half-open state according to a preferred embodiment of the present invention.
  • Figure 12 is a structural schematic view showing the maximum opening state of the check valve according to the preferred embodiment of the present invention.
  • Figure 13 is a schematic structural view showing a state in which a check valve is opened in a preferred embodiment of the present invention
  • Figure 14 is a schematic view showing the operation of the check valve cleaning and replacing member of the present invention.
  • valve body 101, protruding position; 102, valve cover; 2, check valve; 201, valve seat; 2011, boss; 2012, pit; 202, valve flap; 2021, limit groove; 203, rocker; 2031, hook portion; 2032, buttonhole; 204, double torsion spring; 205, roller; 206, pin; 207, limit hook; 208, rubber sheet; 209, pressure plate; 210, support 3, drain valve; 4, support; 5, fixing nut; 6, stud; 7, lock nut; 8, clearance.
  • a pressure reducing type backflow preventer includes a valve body 1, two check valves 2 of the same structure, and a drain valve 3; a valve body is formed inside the valve body, and a valve body of the valve body is formed.
  • the wall has a water inlet, a water outlet and a water outlet; the two check valves are fixedly mounted in the valve body through the support member 4, respectively at the water inlet and the water outlet; the drain valve is installed outside the valve body, At the drain outlet;
  • the check valve 2 includes a valve seat 201, a valve flap 202, a rocker 203, and a double torsion spring 204; one side of the valve flap is hinged at an upper end of the valve seat, and the other side of the valve flap is mounted with a roller 205; One end of the rocker is a fixed end, and the other end is a free end, and the fixed end of the rocker is connected to the lower end of the valve seat through a pin 206; the roller abuts on the rocker and is at the fixed end of the rocker and the free end of the rocker Sliding between the two ends of the valve seat; the double torsion spring is disposed on the pin shaft
  • the middle twist arm is limited by the rocker.
  • the left and right twisting arms of the double torsion spring are limited by the limit hook at the lower end of the valve seat; the spring force of the double torsion spring acts on the rocker to make the valve flap normally closed.
  • the roller on the valve flap is rolled on the rocker by an external force to realize the opening of the valve flap.
  • the flow of water flows from the left to the right, and the two valves are flushed through the decompression type backflow preventer of the present invention.
  • the two check valve flaps are closed to prevent backflow, and the liquid in the valve body cavity is from below.
  • the drain valve flows away.
  • the free end of the rocker is provided with a hook portion 2031.
  • the hook portion is used to clamp the roller, so that the valve flap cannot be further opened, and the limit function is performed.
  • the first advantage of the decompression type backflow preventer of the present invention is that the swinging structure is different in the check valve, so that the preventer achieves better backflow prevention effect: on the one hand, due to the structure in which the double torsion spring interacts with the rocker, Ensure that there is sufficient sealing between the seat and the disc when the disc is closed. During the opening of the flap, the resistance of the check valve to the water flow decreases as the opening of the flap increases. On the other hand, regardless of the increase or decrease of the water flow, the roller of the check valve slides along the length of the rocker, and the rocker plays a certain guiding role, so that the opening of the valve flap is more stable.
  • the left and right sides of the valve seat of each check valve extend outwardly with bosses 2011 for fixing the mounting support members, each of which Two fixing nuts 5 are arranged on the boss; there are two supporting members of the invention, each of which is connected with a stud 6 , and the stud is sleeved with a lock nut 7; the support member is internally threaded.
  • One end of the stud is screwed to the fixing nut, and the other end of the stud is screwed to the support member; the support member is fixedly installed in the valve body by adjusting the lock nut on the stud.
  • the side of the boss is in contact with the inner wall of the valve body, so that the check valve cannot swing side by side.
  • a certain gap 8 is left between the bottom surface of the boss on the left and right sides of the valve seat and the inner wall of the valve body, so that when the worker removes the check valve, the slot can be inserted into the gap by using a flat-blade screwdriver, and the entire check valve is used. It is easy to disassemble, as shown in Figure 4-5.
  • the top of the valve body is provided with a detachable valve cover 102.
  • the installation and disassembly process of the check valve of the present invention is as follows:
  • the check valve When the check valve is installed, first place a check valve into the valve body at the water outlet, and then put another check valve into the valve body at the water inlet. Screw the stud into the retaining nut of the check valve at the water inlet, and then push the support outward to the check valve seat at the water outlet by tightening the locknut on the stud.
  • the two check valves are fixedly installed in the valve body to ensure that the check valve is in close contact with each other under frequent vibration conditions and will not loosen.
  • a button hole 2032 is formed in the free end of the rocker of the check valve.
  • a side of the valve disc on which the roller is mounted is provided with a limiting groove 2021 for restricting the movement of the rocker back hook.
  • the operator can insert the button hole of the rocker into a protruding position (the protruding position 101 can be set on the valve body 1 or Set in the convenient cleaning position), then force the valve clockwise to the valve seat, open the rocker, and then hook the hook of the rocker into the limit groove of the roller and the valve flap, so that the valve flap is always Open state, easy to clean and replace parts.
  • the valve flap is provided with a rubber sheet 208 and a pressure plate 209, and the rubber sheet is fixed on the valve flap by bolts on the pressure plate.
  • the rubber sheet of the check valve is generally easy to wear. When the worker changes it, the bolt on the pressure plate is directly twisted, and the rubber sheet can be replaced.
  • the double torsion spring of the check valve of the present invention is easy to install, and the spring member of the conventional check valve structure is very cumbersome to install.
  • the present invention only needs to insert the double torsion spring through the two limit hooks disposed at the lower end of the valve seat. On the pin shaft, then use a screwdriver to respectively push the two torsion arms of the double torsion spring to the corresponding limit hook limit. This hooking method facilitates the installation and disassembly of the spring.
  • the valve seat is provided with two supporting pieces 210 for fixing the valve flap, and the valve flap is fixed between the two supporting pieces by a pivot; the valve seat is a plastic part.
  • the support piece, the limit hook 207 and the fixing nut 5 are all metal parts, and the support piece, the limit hook and the fixing nut are integrally formed with the valve seat by using the plastic insert technology.
  • the invention adopts the plastic insert technology as the processing technology known in the prior art, and is applied to the check valve of the invention to obtain better effects.
  • the fourth advantage of the decompression type backflow preventer of the present invention is that the plastic valve seat and the metal piece, the metal hook and the metal nut are formed in one time by using the plastic insert technology, and the parts are not required to be fixed by bolting or other mechanical means.
  • the domestic valve seat is basically made of metal material, the fixed connection between the parts and components consumes time and materials; and the check valve is solved.
  • the components and the valve seat repeatedly vibrate, and the components are prone to loosening.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Public Health (AREA)
  • Water Supply & Treatment (AREA)
  • Check Valves (AREA)

Abstract

L'invention concerne un dispositif anti-refoulement de type à pression réduite, comprenant un corps de soupape (1), deux clapets anti-retour (2) qui présentent la même structure et une soupape de vidange (3). Une cavité est formée dans le corps de soupape et une entrée d'eau, une sortie d'eau et une ouverture de vidange sont formées dans une paroi de soupape du corps de soupape; les deux clapets anti-retour sont montés de manière fixe dans le corps de soupape au moyen d'une pièce de support (4) et sont situés au niveau de l'entrée d'eau et de la sortie d'eau respectivement; la soupape de vidange est montée à l'extérieur du corps de soupape et est située au niveau de l'ouverture de vidange; chaque clapet anti-retour comprend un siège de soupape (201), un clapet de soupape (202), un culbuteur (203) et des doubles ressorts de torsion (204); un côté de chaque clapet de soupape est articulé à l'extrémité supérieure du siège de soupape et un rouleau (205) est monté sur l'autre côté de ce dernier; les culbuteurs sont reliés aux extrémités inférieures des sièges de soupape au moyen d'arbres de broche (206); les rouleaux butent contre les culbuteurs et coulissent sur les culbuteurs; les arbres de broche sont emmanchés sur ces derniers avec les doubles ressorts de torsion; et les forces de ressort des doubles ressorts de torsion agissent sur les culbuteurs pour maintenir les clapets de soupape dans un état normalement fermé et les rouleaux sur les clapets de soupape sont activés pour rouler sur les culbuteurs au moyen de forces externes de façon à ouvrir les clapets de soupape. Grâce aux doubles structures de ressort de torsion et de culbuteur des clapets anti-retour, le dispositif anti-refoulement de type à pression réduite permet d'obtenir un meilleur effet de prévention de l'écoulement.
PCT/CN2017/118999 2017-02-06 2017-12-27 Dispositif anti-refoulement de type à pression réduite WO2018141185A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US16/335,247 US20190249778A1 (en) 2017-02-06 2017-12-27 Reduced-Pressure Type Backflow Preventer

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201710066249.6A CN106594325B (zh) 2017-02-06 2017-02-06 减压型倒流防止器
CN201710066249.6 2017-02-06

Publications (1)

Publication Number Publication Date
WO2018141185A1 true WO2018141185A1 (fr) 2018-08-09

Family

ID=58585481

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2017/118999 WO2018141185A1 (fr) 2017-02-06 2017-12-27 Dispositif anti-refoulement de type à pression réduite

Country Status (3)

Country Link
US (1) US20190249778A1 (fr)
CN (1) CN106594325B (fr)
WO (1) WO2018141185A1 (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106594325B (zh) * 2017-02-06 2018-11-20 广东永泉阀门科技有限公司 减压型倒流防止器
CN108458144B (zh) * 2018-04-25 2024-09-10 广东永泉阀门科技有限公司 一种通用泄水阀
CN110345282A (zh) * 2019-06-20 2019-10-18 陈炯亮 一种减压型倒流防止器
CN110541816A (zh) * 2019-09-23 2019-12-06 睿控节能技术服务(深圳)有限公司 蝶形双瓣单向阀逆阻装置
CN110735951B (zh) * 2019-10-30 2025-08-08 南京协威机械有限公司 防火止回阀
CN112113007B (zh) * 2020-09-16 2022-06-07 盐城市精工阀门有限公司 一种自清理式高效逆止阀
CN112815118A (zh) * 2021-03-22 2021-05-18 上海一核阀门股份有限公司 一种旋启式止回阀的阀瓣安装结构
US11976736B2 (en) * 2021-07-20 2024-05-07 Acorn Engineering Company, Inc. Eccentric backflow preventer
CN113933047B (zh) * 2021-10-15 2023-11-14 江苏卡一阀门制造有限公司 一种升降式止回阀体试验装置
CN115095694B (zh) * 2022-07-05 2025-07-01 江苏圣泰阀门有限公司 压力密封内挂支架式止回阀

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5711341A (en) * 1997-02-25 1998-01-27 Conbraco Industries, Inc. Swing-type check valve assembly retained within a valve housing by abutting engagement with a valve cover and a port of the valve housing
US5794655A (en) * 1997-02-25 1998-08-18 Conbraco Industries, Inc. Swing-type check valve assembly having an integrated valve seat and valve housing cover
CN2442057Y (zh) * 2000-09-05 2001-08-08 南海市九江永兴阀门制造有限公司 倒流防止器
CN204828785U (zh) * 2015-05-20 2015-12-02 天津市塘沽沃特斯阀门有限公司 一种安全型节水倒流防止器
CN105927767A (zh) * 2016-07-28 2016-09-07 广东永泉阀门科技有限公司 一种新型低阻力倒流防止器
CN106594325A (zh) * 2017-02-06 2017-04-26 广东永泉阀门科技有限公司 减压型倒流防止器
CN206572026U (zh) * 2017-02-06 2017-10-20 广东永泉阀门科技有限公司 减压型倒流防止器

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4893654A (en) * 1988-07-08 1990-01-16 Feuz John G Double check valve backflow preventer assembly
US5046525A (en) * 1990-06-15 1991-09-10 Ames Company, Inc. Differential loading fluid check valve
US5584315A (en) * 1995-12-18 1996-12-17 Ames Company, Inc. Check valve assembly and method for mounting and installing check valves within a housing
US6443181B1 (en) * 2000-12-28 2002-09-03 Hunter Innovations, Inc. Backflow prevention apparatus
US6648013B1 (en) * 2001-06-20 2003-11-18 Watts Industries, Inc. Check valve having variable opening-force threshold
AT510942B1 (de) * 2011-01-12 2013-05-15 Praher Kunststofftechnik Gmbh Rückschlagklappe
JP6017798B2 (ja) * 2012-02-23 2016-11-02 フタバ産業株式会社 排気流路用弁装置
US8887756B2 (en) * 2012-12-04 2014-11-18 Douglas Hunter Powell Shutoff valve in backflow prevention device

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5711341A (en) * 1997-02-25 1998-01-27 Conbraco Industries, Inc. Swing-type check valve assembly retained within a valve housing by abutting engagement with a valve cover and a port of the valve housing
US5794655A (en) * 1997-02-25 1998-08-18 Conbraco Industries, Inc. Swing-type check valve assembly having an integrated valve seat and valve housing cover
CN2442057Y (zh) * 2000-09-05 2001-08-08 南海市九江永兴阀门制造有限公司 倒流防止器
CN204828785U (zh) * 2015-05-20 2015-12-02 天津市塘沽沃特斯阀门有限公司 一种安全型节水倒流防止器
CN105927767A (zh) * 2016-07-28 2016-09-07 广东永泉阀门科技有限公司 一种新型低阻力倒流防止器
CN106594325A (zh) * 2017-02-06 2017-04-26 广东永泉阀门科技有限公司 减压型倒流防止器
CN206572026U (zh) * 2017-02-06 2017-10-20 广东永泉阀门科技有限公司 减压型倒流防止器

Also Published As

Publication number Publication date
CN106594325A (zh) 2017-04-26
CN106594325B (zh) 2018-11-20
US20190249778A1 (en) 2019-08-15

Similar Documents

Publication Publication Date Title
WO2018141185A1 (fr) Dispositif anti-refoulement de type à pression réduite
CN219866344U (zh) 一种无导轨的弹性座封闸阀
CN106594332B (zh) 减压型防倒流止回阀
CN110345282A (zh) 一种减压型倒流防止器
CN206572026U (zh) 减压型倒流防止器
CN206563106U (zh) 减压型防倒流止回阀
CN210461798U (zh) 一种减压型倒流防止器
CN111663637A (zh) 一种助力补偿式拍门
CN208793706U (zh) 一种衬耐火型高温三通蝶阀
CN112049958A (zh) 一种卧式全通径双向偏心半球阀
CN207762314U (zh) 一种排水阀的安装固定装置
CN217559105U (zh) 一种高压压力密封止回阀
CN202392120U (zh) 三角阀
CN222949119U (zh) 一种便于安装的卫浴龙头
CN208579003U (zh) 一种滑道式滚球止回阀
CN222416175U (zh) 一种低阻力倒流防止器
CN2779180Y (zh) 偏心半球面旋塞阀
CN210218759U (zh) 煤化工专用球阀
CN220792100U (zh) 一种开式弹性刀闸阀
CN215059670U (zh) 一种超短型球阀
CN205841873U (zh) 一种倒流防止器用低阻力止回阀
CN210566633U (zh) 一种用于消防喷水灭火的闸阀
CN218992424U (zh) 一种锁闭式硬密封全焊接球阀
CN111734868B (zh) 一种防盗水阀门
CN223360097U (en) Valve rod connecting piece

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 17895464

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 17895464

Country of ref document: EP

Kind code of ref document: A1